US4820984A - MR tomography method and MR tomography apparatus for performing the method - Google Patents

MR tomography method and MR tomography apparatus for performing the method Download PDF

Info

Publication number
US4820984A
US4820984A US07/094,568 US9456887A US4820984A US 4820984 A US4820984 A US 4820984A US 9456887 A US9456887 A US 9456887A US 4820984 A US4820984 A US 4820984A
Authority
US
United States
Prior art keywords
pulses
magnetic
gradient field
slices
field
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/094,568
Other languages
English (en)
Inventor
Michael H. Kuhn
Graeme C. McKinnon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
US Philips Corp
Original Assignee
US Philips Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
Assigned to U.S. PHILIPS CORPORATION, 100 EAST 42ND STREET, NEW YORK, N.Y. 10017, A CORP. OF DE. reassignment U.S. PHILIPS CORPORATION, 100 EAST 42ND STREET, NEW YORK, N.Y. 10017, A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: KUHN, MICHAEL H., MC KINNON, GRAEME C.
Application granted granted Critical
Publication of US4820984A publication Critical patent/US4820984A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
    • G01R33/48—NMR imaging systems
    • G01R33/483—NMR imaging systems with selection of signals or spectra from particular regions of the volume, e.g. in vivo spectroscopy
    • G01R33/4833—NMR imaging systems with selection of signals or spectra from particular regions of the volume, e.g. in vivo spectroscopy using spatially selective excitation of the volume of interest, e.g. selecting non-orthogonal or inclined slices
    • G01R33/4835—NMR imaging systems with selection of signals or spectra from particular regions of the volume, e.g. in vivo spectroscopy using spatially selective excitation of the volume of interest, e.g. selecting non-orthogonal or inclined slices of multiple slices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
    • G01R33/48—NMR imaging systems
    • G01R33/54—Signal processing systems, e.g. using pulse sequences ; Generation or control of pulse sequences; Operator console
    • G01R33/56—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution
    • G01R33/561—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution by reduction of the scanning time, i.e. fast acquiring systems, e.g. using echo-planar pulse sequences

Definitions

  • FIG. 2 shows a block diagram of such an apparatus
  • Each of the slices is thus excited by a first rf pulse in conjunction with a 180° rf pulse, thus forming a spin echo signal in the relevant slice.
  • the spin echo signals E1, E2 and E3 (see FIG. 3e) formed in the three slices occur at the instants t1, t2 and t3 which are situated at the same distance from the further rf pulses b1, b2 and b3, respectively, as these pulses are situated from the first rf pulses a1, a2 and a3, respectively.
  • the clock pulse generator 16 is enabled during the appearance of the spin echo signals E1...E3. Therefore, these signals can be converted into digital values which are loaded into the memory 14 or processed in the arithmetic device 17.
  • the next cycle may be started etc. only the time integral over Gy being varied from one cycle to another. If the beginning of the next cycle were to be postponed until the longitudinal magnetization in the excited slices would have been completely restored (i.e. a waiting period of at least a few 100 ms), no substantial gain would be made as regards the speed of imaging.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
US07/094,568 1986-09-12 1987-09-09 MR tomography method and MR tomography apparatus for performing the method Expired - Fee Related US4820984A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3631039 1986-09-12
DE19863631039 DE3631039A1 (de) 1986-09-12 1986-09-12 Kernspintomographieverfahren und kernspintomograph zur durchfuehrung des verfahrens

Publications (1)

Publication Number Publication Date
US4820984A true US4820984A (en) 1989-04-11

Family

ID=6309425

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/094,568 Expired - Fee Related US4820984A (en) 1986-09-12 1987-09-09 MR tomography method and MR tomography apparatus for performing the method

Country Status (4)

Country Link
US (1) US4820984A (de)
EP (1) EP0259935B1 (de)
JP (1) JPS6371241A (de)
DE (2) DE3631039A1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4939461A (en) * 1988-03-12 1990-07-03 U.S. Philips Corporation Method of determining the nuclear magnetization distribution, and device for performing the method
US5126673A (en) * 1988-07-09 1992-06-30 Spectrospin Ag Method for generating a sequence of spin echo signals, the application of this method in nuclear spin tomography, and a devicefor carrying out and/or for applying this method
US5168226A (en) * 1991-05-22 1992-12-01 General Electric Acquisition of multiple images in fast spin echo nmr scans
US5422572A (en) * 1993-08-06 1995-06-06 Toshiba America Mri, Inc. Method and apparatus for substantially simultaneously exciting a plurality of slices in NMR imaging
US5523688A (en) * 1993-08-13 1996-06-04 Oliver Heid Method for operating a magnetic resonance imaging apparatus to obtain a high T2 contrast
US5578924A (en) * 1995-11-15 1996-11-26 General Electric Company Methods for the simultaneous detection of multiple magnetic resonance images
US20150160313A1 (en) * 2012-04-16 2015-06-11 Andrzej Jesmanowicz System and method for direct radio frequency phase control in magnetic resonance imaging
US20190018097A1 (en) * 2016-01-29 2019-01-17 Samsung Electronics Co., Ltd. Magnetic resonance imaging apparatus and magnetic resonance image acquisition method thereof

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8703127A (nl) * 1987-12-24 1989-07-17 Philips Nv Werkwijze en inrichting voor het genereren van vervlochten multiple-slice en multiple-echo pulssequenties voor mri.
US5544652A (en) * 1994-03-04 1996-08-13 The United States Of America As Represented By The Department Of Health And Human Services Ultrafast burst imaging using shifting of excited regions
DE4430460C2 (de) * 1994-08-27 1999-06-17 Hennig Juergen Prof Dr Verfahren der bildgebenden Kernspintomographie zur simultanen Erzeugung mehrerer Schichtbilder
JP4733825B2 (ja) * 2000-10-30 2011-07-27 株式会社東芝 磁気共鳴イメージング装置及び磁気共鳴イメージング方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4115730A (en) * 1976-04-14 1978-09-19 National Research Development Corporation Nuclear magnetic resonance apparatus and methods
US4431968A (en) * 1982-04-05 1984-02-14 General Electric Company Method of three-dimensional NMR imaging using selective excitation
US4558278A (en) * 1982-12-17 1985-12-10 Picker International, Limited Nuclear magnetic resonance methods and apparatus
US4577152A (en) * 1983-04-11 1986-03-18 Albert Macovski Selective material projection imaging system using nuclear magnetic resonance
US4654595A (en) * 1983-06-23 1987-03-31 Instrumentarium Oy Method of analyzing properties of a matter or a magnetic field
US4665367A (en) * 1985-08-16 1987-05-12 Technicare Corporation Multiplexed magnetic resonance imaging of volumetric regions
US4673880A (en) * 1985-08-16 1987-06-16 Technicare Corporation Phase sensitive detection in multislice magnetic resonance imaging systems
US4717879A (en) * 1986-05-05 1988-01-05 Duke University Pulse sequence for NMR image acquisition

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4297637A (en) * 1978-07-20 1981-10-27 The Regents Of The University Of California Method and apparatus for mapping lines of nuclear density within an object using nuclear magnetic resonance
DE4115730A1 (de) * 1990-05-22 1991-12-19 Weck Hans Juergen Anordnung zur objektidentifikation

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4115730A (en) * 1976-04-14 1978-09-19 National Research Development Corporation Nuclear magnetic resonance apparatus and methods
US4431968A (en) * 1982-04-05 1984-02-14 General Electric Company Method of three-dimensional NMR imaging using selective excitation
US4558278A (en) * 1982-12-17 1985-12-10 Picker International, Limited Nuclear magnetic resonance methods and apparatus
US4577152A (en) * 1983-04-11 1986-03-18 Albert Macovski Selective material projection imaging system using nuclear magnetic resonance
US4654595A (en) * 1983-06-23 1987-03-31 Instrumentarium Oy Method of analyzing properties of a matter or a magnetic field
US4665367A (en) * 1985-08-16 1987-05-12 Technicare Corporation Multiplexed magnetic resonance imaging of volumetric regions
US4673880A (en) * 1985-08-16 1987-06-16 Technicare Corporation Phase sensitive detection in multislice magnetic resonance imaging systems
US4717879A (en) * 1986-05-05 1988-01-05 Duke University Pulse sequence for NMR image acquisition

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4939461A (en) * 1988-03-12 1990-07-03 U.S. Philips Corporation Method of determining the nuclear magnetization distribution, and device for performing the method
US5126673A (en) * 1988-07-09 1992-06-30 Spectrospin Ag Method for generating a sequence of spin echo signals, the application of this method in nuclear spin tomography, and a devicefor carrying out and/or for applying this method
US5168226A (en) * 1991-05-22 1992-12-01 General Electric Acquisition of multiple images in fast spin echo nmr scans
US5422572A (en) * 1993-08-06 1995-06-06 Toshiba America Mri, Inc. Method and apparatus for substantially simultaneously exciting a plurality of slices in NMR imaging
US5523688A (en) * 1993-08-13 1996-06-04 Oliver Heid Method for operating a magnetic resonance imaging apparatus to obtain a high T2 contrast
US5578924A (en) * 1995-11-15 1996-11-26 General Electric Company Methods for the simultaneous detection of multiple magnetic resonance images
US20150160313A1 (en) * 2012-04-16 2015-06-11 Andrzej Jesmanowicz System and method for direct radio frequency phase control in magnetic resonance imaging
US20190018097A1 (en) * 2016-01-29 2019-01-17 Samsung Electronics Co., Ltd. Magnetic resonance imaging apparatus and magnetic resonance image acquisition method thereof

Also Published As

Publication number Publication date
JPS6371241A (ja) 1988-03-31
EP0259935A2 (de) 1988-03-16
DE3631039A1 (de) 1988-03-24
DE3775149D1 (de) 1992-01-23
EP0259935B1 (de) 1991-12-11
EP0259935A3 (en) 1988-10-05

Similar Documents

Publication Publication Date Title
JP4427152B2 (ja) Ｍｒｉシステムによる画像形成方法及びｍｒｉシステム
US5636636A (en) Magnetic resonance method for imaging a moving object and device for carrying out the method
EP0571018B1 (de) Verfahren und Apparats mittels magnetischer Resonanz durch Magnetisierungsübertragungs-Kontrast induzierende fettselektive Hochfrequenz-Impulse
US4739266A (en) MR tomography method and apparatus for performing the method
EP0322968B1 (de) Verfahren und Anordnung zum Erzeugen verschachtelter Mehrscheiben-Mehrecho-Impulsfolgen für Bilderzeugung mittels magnetischer Resonanz
EP0414318B1 (de) Schnelles Multimode-Magnetresonanz-Abbildungsverfahren
US5339035A (en) MR imaging with rectangular magnetization transfer pulse
US4820984A (en) MR tomography method and MR tomography apparatus for performing the method
US4654591A (en) NMR flow imaging using bi-phasic excitation field gradients
US4972148A (en) Magnetic resonance tomography method and magnetic resonance tomography apparatus for performing the method
US5578921A (en) Magnetic resonance imaging using three-dimensional spectral-spatial excitation
US4845430A (en) Magnetic resonance imaging system
US4918387A (en) MR spectroscopy method
US4818941A (en) MR tomography method and apparatus for performing the method
US5015956A (en) Magnetic resonance tomography method for determining the nuclear magnetization in a number of parallel slices
US4823084A (en) Method of determining the spectral distribution of the nuclear magnetization in a limited volume range
JPH03176031A (ja) 磁気共鳴断層写真方法及び装置
US5034693A (en) Method for localized nuclear resonance spectroscopy and apparatus for carrying out the method
US4843549A (en) Method of determining the spectral distribution of the nuclear magnetization in a limited volume, and device for performing the method
US5235278A (en) Magnetic resonance spectroscopy method and device for performing the method
JP3169640B2 (ja) ２次元核磁気共鳴分光用方法
US4825160A (en) Method and device for MR tomography
US4862083A (en) Magnetic resonance examination apparatus and method of operation thereof
US4868503A (en) Magnetic resonance spectroscopy method
US4814710A (en) Method of determining the spectral distribution of the nuclear magnetization in a limited volume range

Legal Events

Date Code Title Description
AS Assignment

Owner name: U.S. PHILIPS CORPORATION, 100 EAST 42ND STREET, NE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:KUHN, MICHAEL H.;MC KINNON, GRAEME C.;REEL/FRAME:004789/0299

Effective date: 19871023

Owner name: U.S. PHILIPS CORPORATION, 100 EAST 42ND STREET, NE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KUHN, MICHAEL H.;MC KINNON, GRAEME C.;REEL/FRAME:004789/0299

Effective date: 19871023

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 19970416

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362